Most small business owners heard the headline: the One Big Beautiful Bill Act brought back 100% bonus depreciation. What they didn’t hear was the fine print that could make a real difference in how much of that benefit they actually keep. I’ve been digging into the details since the IRS dropped Notice 2026-11 in January, and I’ll be honest, the strategy here is more nuanced than the press coverage suggests.

Let me back up for context. Before the OBBBA was signed on July 4, 2025, bonus depreciation was in a painful phase-down triggered by the Tax Cuts and Jobs Act. By 2024, the rate had already fallen to 60%. It was scheduled to drop further and disappear entirely by 2027. The OBBBA reversed all of that permanently, restoring 100% bonus depreciation for qualified property acquired after January 19, 2025. At the same time, the law doubled the Section 179 expensing limit to $2.56 million for 2026, up from $1.22 million in 2024, with a phase-out threshold of $4.09 million. Both figures are now inflation-adjusted annually going forward.

Two big tools. Similar surface purpose. Very different mechanics. And the wrong sequencing can cost you money.

The Core Difference Most Owners Miss

Here’s where I want to slow down, because this is the part that gets glossed over in most summaries.

Section 179 and bonus depreciation both let you deduct the cost of equipment or other qualifying property immediately, rather than depreciating it over years. But they operate under different rules, and those rules matter depending on your situation.

Section 179 is capped, flexible, and requires existing taxable income to work. You can only use it up to the amount of your business income for the year. It cannot create a net operating loss. You also get to pick and choose which assets you apply it to, which gives you surgical control over your deduction amount.

Bonus depreciation has no annual dollar cap. It’s applied automatically to all qualifying property unless you elect out, and unlike Section 179, it can push your federal taxable income below zero, creating a net operating loss that carries forward to offset up to 80% of future taxable income per year. That’s a powerful tool if you expect higher income in coming years.

What surprised me when I worked through this is how often business owners apply one when they should be using the other, or use both without thinking about the order. The IRS requires Section 179 to be applied first, before bonus depreciation. That sequencing matters a lot in practice.

When Section 179 Should Come First

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FeatureSection 179Bonus Depreciation
Annual Dollar Cap$2.56 million (2026)No annual cap
Phase-out Threshold$4.09 millionN/A
Can Create NOLNoYes (up to 80% of future income)
Asset SelectionPick and chooseAll-or-nothing per asset class
Requires Taxable IncomeYes, cannot exceed business incomeNo
Applies to Used PropertyYesYes (if new to your business)
Applied FirstYes (IRS-required sequencing)After Section 179
State ConformityVaries by stateNon-conforming in CA, NY, NJ, PA

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If you’re profitable, expect to stay profitable, and your state conforms to federal tax law, Section 179 is often the cleaner starting point. You get an immediate deduction, you can target it precisely, and you avoid creating an NOL you might not need.

The $2.56 million limit sounds enormous, and for most small businesses, it is. The phase-out starts at $4.09 million in total qualifying property placed in service during the year. If you’re under that threshold, you’ve got a lot of runway. According to Landmark CPAs, the new limits make Section 179 a practical tool for a much wider range of businesses than it was even two years ago.

The key advantage: flexibility. If you want to deduct $180,000 of a $400,000 equipment purchase and depreciate the rest conventionally, Section 179 lets you do that. Bonus depreciation is all-or-nothing on a per-asset-class basis.

When Bonus Depreciation Becomes the Better Lever

Here’s where it gets interesting. If you’re having a banner year, or you’ve recently made a large capital investment that’s going to compress your income for a while, bonus depreciation’s ability to generate an NOL is actually valuable, not just a side effect.

Say you buy $3 million in qualified property. After Section 179 hits its limit or your income ceiling, bonus depreciation can take the rest to zero, and beyond. That loss carries forward. In a year where you’re expecting significant revenue growth, having that carryforward ready to absorb up to 80% of future income is real money.

Bloomberg Tax noted in March 2026 that this NOL-creation feature is being used intentionally by businesses anticipating strong post-investment revenue, essentially pre-loading deductions against future taxable years. It’s not aggressive tax planning. It’s what the law is designed to enable.

Also worth understanding: bonus depreciation applies to used property now, not just new, as long as it’s new to your business. That opens up the strategy for businesses that buy pre-owned equipment.

The State Tax Problem Nobody Warns You About

I’ll be honest, this is the part that bites people. And it bites them hard.

California, New York, New Jersey, and Pennsylvania do not conform to federal bonus depreciation. That means if you take a $1.5 million bonus depreciation deduction on your federal return, you may still owe state income tax on that $1.5 million because your state doesn’t recognize the deduction. You could have a federal tax liability near zero and still write a significant check to Sacramento or Albany.

This isn’t theoretical. I’ve seen businesses plan around a big equipment purchase, feel great about the federal write-off, and then get blindsided by a five-figure state tax bill they didn’t budget for. Doeren Mayhew flagged this specifically in their April 2026 analysis as one of the most commonly overlooked planning failures under the new law.

Section 179 has its own state conformity issues, but they vary differently and some states do conform partially. The point is: you need to know your state’s rules before you commit to a depreciation strategy, not after.

The R&D Deadline You Might Be About to Miss

This is a separate provision, but it connects to the same law and I’d be doing you a disservice not to flag it. The OBBBA created a retroactive R&D election window that lets eligible small businesses claim refunds on 2022 through 2024 returns. The deadline for making that election is July 4, 2026. If this applies to you and you haven’t acted, you have very little time.

RSM US detailed how IRS interim guidance under Notice 2026-11 is still pending final regulations, which adds some uncertainty to planning. The proposed regs aren’t out yet, and that matters for edge cases, particularly around acquisition date rules and which assets qualify under the new permanent regime. If you’re dealing with anything unusual, a property lease-to-own situation, a mid-year acquisition, or foreign-manufactured equipment, you want a CPA who’s read the notice, not just the headlines.

The honest bottom line is this: the OBBBA genuinely expanded what small business owners can do with depreciation, and the expanded Section 179 limits and restored bonus depreciation together are a real opportunity. But the opportunity is not one-size-fits-all. Your income level, your state, your growth trajectory, and your NOL position all change the answer. Get into the specifics with a qualified tax advisor before you place property in service and assume the deduction is locked in the way you think it is.

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This article is for general informational purposes only and does not constitute financial, tax, or legal advice. Business finance and tax rules vary by entity type, state, and individual circumstances. Consult a qualified CPA, enrolled agent, or business attorney for advice specific to your situation.

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